Two similar coils have self-inductance of 20 mH each. Coefficient of c – McqOptions

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1.	Two similar coils have self-inductance of 20 mH each. Coefficient of coupling is 0.4. The mutual inductance M is ______________
A.	2.5 mH
B.	8 mH
C.	7 mH
D.	1 mH
Answer» C. 7 mH

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